Oil return line
Registered User
Joined: Oct 2008
Posts: 1,582
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From: Tulsa,OK
fluids dont magically defy gravity last time I checked its the way greddy designed the kit, it will be just fine use logic, think about it its impossible for the oil to "back up" in the tube show me one a SINGLE case of anyone even claiming this was an issue a link please good sirs.
Registered User
Joined: Mar 2010
Posts: 910
Likes: 3
From: lakes region NH
oh look the mugen turbo kit for the CRX
oil return line to the drain bolt
if Honda says its ok I'll take their word for it
Joined: Mar 2005
Posts: 4,692
Likes: 6
From: Centreville, Va
If it works for you 
To point out the fallacy regarding your fluid dynamics explanation: running a return line below the oil level of the pan impedes the flow of the oil returning from the turbo; so yes, oil can "back up" and cause blown seals. 
To point out the fallacy regarding your fluid dynamics explanation: running a return line below the oil level of the pan impedes the flow of the oil returning from the turbo; so yes, oil can "back up" and cause blown seals.
Registered User
Joined: Mar 2010
Posts: 910
Likes: 3
From: lakes region NH
it really cant......
the oil in the drain line will never go above the level of oil in the pan (so about 2-3" above the drain plug)
the only and I mean ONLY way for it to back up is if you use an obnoxiously sized feed line and it puts out more oil then the drain can keep up (this would also back up no matter where you put the return line)
or
the crank becomes so positively pressurized that the oil is pushed up the line. if it becomes that highly pressurized you probably no longer have piston rings
either way OP do as you wish listen to the guy who has no experience doing it this way an buys into the internet hype or the guy who has done it and will do it this way again with my Vortech kit.
the oil in the drain line will never go above the level of oil in the pan (so about 2-3" above the drain plug)
the only and I mean ONLY way for it to back up is if you use an obnoxiously sized feed line and it puts out more oil then the drain can keep up (this would also back up no matter where you put the return line)
or
the crank becomes so positively pressurized that the oil is pushed up the line. if it becomes that highly pressurized you probably no longer have piston rings
either way OP do as you wish listen to the guy who has no experience doing it this way an buys into the internet hype or the guy who has done it and will do it this way again with my Vortech kit.
Registered User
Joined: Dec 2006
Posts: 24,119
Likes: 4
From: Seattle / Kalifornia
After countless blown seals on turbos due to lines not being properly gravity fed I'll still avoid any upward turns in my drain line.
I'm aware of the physics at work but without time to sit and think about 10 other variables possibly at work in the equation not being considered I'll just go with what works for everyone.
Return line on the drain is straight cheese. Honestly, I think civic owners should look to us for advice rather than the other way around. Not to say there's not great civic stuff occurring but as a whole.
There's been countless failures of turbo seals due to this issue and rather wrongly attributed or not, there's so many I've read through that it's become well known "fact", thus I believe something related to it is the cause none the less.
I'm aware of the physics at work but without time to sit and think about 10 other variables possibly at work in the equation not being considered I'll just go with what works for everyone.
Return line on the drain is straight cheese. Honestly, I think civic owners should look to us for advice rather than the other way around. Not to say there's not great civic stuff occurring but as a whole.
There's been countless failures of turbo seals due to this issue and rather wrongly attributed or not, there's so many I've read through that it's become well known "fact", thus I believe something related to it is the cause none the less.
